Paper-drying machine



Feb. 19, 1929.

W. A. LORENZ PAPER DRYING MACHINE Filed Aug. 192'? Patented Feb. 19, 1929.

' UNITED STATES PATENT OFFICE.

WILLIAM A. LORENZ, OF WEST HARTFORD, CONNECTICUT, .ASSIGNOR TO THE OTAKA FABRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTI- CUT.

PAPER-DRYING MACHINE.

Application filed August 9, 1927. Serial No. 211,764.

This invention relates to machines for drying paper, and has particular application for drying paper which has been made elastic, such, for instance, as crinkled paper or crinkled paper with longitudinal corrugations.

The aim of the invention is to provide a simple and effective machine by means of which elastic or crinkled paper may be economically dried without flattening or ironing out the crinkles.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which willbe exemplified in the construction herein-- after set forth and the scope of theapplication of which will be indicated in the appended claim.

In the accompanying drawings, wherein I have shown, for illustrative purposes, one of the many embodiments which the present invention may take:

Figure 1 is a plan view of the'apparatus witih a web of paper passing therethrough; an 1 Fig. 2 is a sectional view takensubstantially on line 2-2 of Fig. 1.

Referring to the drawings in detail, 10

designates generally a drying cylinder rotatfl ably mounted on frames 11 and having a steam inlet pipe 12 and an exhaust pip 13. Passing about the cylinder is .an endless belt 15 which is preferably porous. At opposite sides of the cylinder, t e b'elt maybe bowed away from the cylinder. For the purpose of guiding the bowed out parts, guide rolls 16 may be provided. The cylinder 10 maybe driven in any suitable manner, as by means of a belt 17 passing about a pulley 18.

Atthe paper receiving side of the cylinder and between the cylinder and the belt 15' is a vacuum box 20 which is more or less dia grammatically shown as itrmay beof any suitable shape or construction. The vacuum box has a blade or lip 21 which extends up into the angle between the belt and thecylinder, there being a slight space between the lip and cylinder. The vacuum box also has a lower li or blade 22 extending down into the angle between the cylinder and the belt where the belt leaves the cylinder. The blade 21 has such relation to the periphery of the cylinder that air may be sucked through the belt into the box between the cylinder and the blade 21. The vacuum box has a pipe 23 leading to anysuitable pump. If desired, there may also be provided a vacuum box 24 to the right hand side of the cylinder. This vacuum box is generally similar to the one 20 and has a like function.

The paper may be crinkled or longitudinally corrugated and crinkled in any'suitable way. However, by way of example, I

have shown a corrugating and crinkling apparatus similar to that illustrated in my Patit is crinkled, as indicated at P, Fig. 1. It

is, of course, understood that that portion of the paper which is passing over the roller or cylinder 31 is corrugated throughout its )Width, and that the paper, after it passes about the cylinder 32, is crinkled over its entire area. The paper passes from the cylinder 32 onto the endless belt 15 at a point adjacent the upper end of the blade or lip 21 of the vacuum box 20. The paper is car- 'ried by the belt aboutthe cylinder and over a guide roll 40 positioned beneath the vacuum box 20. Since the belt passes about the cylinder, and the cylinder is heated, the belt is also heated, with the result that the paper will be quickly dried without flattening the crinkles. The vacuum boxes causea vacuum under the belt, and this vacuum will be-of sufficient strength tohold the crinkled paper on the outside of the porous belt. Obviously, in case of thick papers, the web may be led about a succession of drying machines simition couldbe made withoutdepartin from the scope thereof, it is intended that a l'matter contained in the above description or shown in the accompanying drawing shall 5 be interpreted as illustrative andnot in a liiniting sense.

It is also to be understood that the language used in the following claim is intended to coverall of the generic and specific fea- 10 tures of the invention herein described and meaeea 

